nRF Connect Error "NRF_ERROR_TIMEOUT"

[Alaa]

I plugged my nRF52 evaluation board to PC using a micro USB cable, dragged a ble_peripheral hex file from Nordic examples to the mounted JLINK drive, started up nRF Connect v2.2.1, launched Bluetooth Low Energy app, chose the recognized COM port, confirmed the message suggesting to program the kit with the required firmware, then I get this error:

10:28:35.9290 Connectivity firmware version 1.2.1 detected
10:28:35.9350 Opening adapter connected to COM39
10:28:36.4700 Successfully opened COM39. Baud rate: 1000000. Flow control: none. Parity: none.
10:28:36.4730 Reset performed on adapter COM39
10:28:38.4770 Error occured when opening port. Errorcode: NRF_ERROR_TIMEOUT (0xd)

Environment:
Windows 7
nRF Connect v2.2.1
PCA10040, V1.2.1
Tried hex file: ble_app_uart_s132_pca10040.hex , ble_app_alert_notification_s132_pca10040.hex

Thanks

[Hung Bui]

Hi Alaa,

Have you tried to test and make sure UART interface works with your computer ? Have you tried UART example in the SDK and use a terminal application PC to interface?

Which Jlink driver version you have on your board ?

I don't understand why you have to "drag a ble_peripheral hex file" to the chip ?